Micrometer bench gauge



March 1, 1949.

J. F. CAMPBELL MICROMETER BENCH GAUGE :5 Sheets-Sheet 1 m m N R WW W m me A -11 i 7% m n Filed July :51, 1947 March 1, 1949.

J. F. CAMPBELL MICROMETER BENCH GAUGE Filed July 31, 1947 3 Sheets-Sheet 2 II l1TIl ||I(| T lllllll ll INVENTOR.

Patented Mar. 1, 1949 UN *1 T ED .S TAT ES OFF! "MICROMETER BENCH GAUGE John F. Campbell, Williamspont, Pa.

' Application July 31, l947y'serial Nbi 765,193

4 Claims.

: i-This invention relates-to measuring gauges for bench work.

Itis an: object of the present invention to provideiaimeasuringgauge for checking tool jigs or production. parts from a, flat surface of a bench with-which a dial gauge can be referred to to take off exact-measurements for determining the exact measurement upon the jig or production part.

-It is anotherobject of the present invention to provide a work bench gauge which can be adjustedin aimircometer fashion and wherein after the adjustment has been eifected adequate means isi'provided' whereby to hold the adjusted parts in their ifixed positions so as to provide a rigid and fixed-:mass of the adjustable parts so that there is littieopportunity for the same to become moved orrplaced'outi of adjustment once the setting has been; made.

It is another object of the present invention to provide amicrometer measurement gauge wherein two turns of the adjusting member having an indicating mark thereon and registering with a scale; is necessary to eifect one unit measurement on the--scalecfrom which the measurements are taken.

Othenobjects of .the present invention are to provide a micrometer bench gauge which can be adaptedizforruse"onvgauge parts of known height and can be used in any number depending upon the height of the work. to be measured, and a micrometer measurement gauge which will consume little space, easy to handle and efficient in operation.

For otheriobjects and fora better understanding of the invention, reference may be had to the iollowin'g detailed description taken in connection; with the accompanying drawing, in which "Figfl is a side elevational view"of my micrometer measuring gauge for bench work.

Fig. 2 is a cross-sectional view, in elevation, taken on line 2-2 of Fig. 3.

Fig. 3 is a front elevational view of my gauge looking upon the front thereof.

Fig. 4 is a cross-sectional view, in elevation, taken on line 4-4 of Fig. 1.

Fig. 5 is a top plan view of the gauge loo-king upon the adjusting member with the top cap removed.

Figs. 6, 7, 8, 9 and are respectively transverse cross-sectional views taken on lines 6-6, 1-1, 8-8, 9-9 and l0IEl of Fig. 2 and looking in the direction of the arrows thereof.

Referring now to the figures, l5 represents a block of which there may be any number and which has a recess H3 in one end and a, projection: H a: at the. other end whereby .these bloeks can. be stacked: one. upon the .other and-retained against lateral:displacement relative-to each other.- These-blocks .are of knownheight and of accurate .dimension; The itoptta'n'cl bottom faces of thebloclr are carefully formed to-b-e smooth and :the bottomfacemay have anotch Ill-therein adapted to collect any small particles of dirt' on the bench. surface. the measuring. gauge is slid thereover.

On these blocks Hi. there may beimounted imyadjustable gauge elementwhich may beindicated generally at:.l9. 'This element c0mprisesa .hollow 1 member 2 I having a ilOWEI radially inwardly extending portion 22 hand another: radiallyinwardlyextendingipor-tion 23. Fitted in the lower portion 22 i is a: bearing sleeve 24: through which a=central-:member 25 may beadjustedq. This member: 25, hasa flange 26. adapted tozfit an opening 21 of a block l5 whereby to makea flush engagement-with the same andto retain the measuring device l9 against displacement from the. 111108 IS. The portion 23 has a central opening lfliin which is a sleeve 2:91; throughrwhich theaicentral member; 25: extends.

On the top ofwtheeportion: 23;-there;rests an adjusting inut 3-! 'whic'hufits over-fa flange 3 2i onzthe sleeve 29 andnwhich is adjustable on a threaded portion 33-of-the central-member;.=25.. the adjusting nut; 31, is; turned; the central member 2 5. willrbe vertically adjusted.

The. central-memberifi hasa slot 34q'extending partly through out the; length Tof; thewsameian d adapted to-receive $116. i-inner aside; of a scale 36. This scale 136. has a-,-series of=-projections 31, thereon from, whichsmeasurementsare taken; These projections are two: hundred oneethousandthsflof an inch; iapartj. Tha-scale: :36 iSifiXed within". the;

opening 34 and to the member 25 by screws 38 extending through elongated slots 39 in the member 25. With these screws tightened, the member will be retained within the opening 34.

Within the member 25 are threaded bores 4| at the opposite ends of the same in which can be adjusted small screws 42. When the screws 38 are loosened, an adjustment can be effected by the screws 42, thereafter a locking screw 44 can be adjusted in the threaded bore 4| whereby to lock the screw 42.

With the scale 36 fixed to the member 25, the member 25 and the scale can be adjusted by the nut 3| to the proper zero setting of the gauge. Thereafter several screws are made fast between the parts so as to positively and rigidly look all of the parts together so that there is little chance of the same becoming released from one another and the setting being spoiled.

The adjustment is effected by the nut 3| and two revolutions of the nut will efiect an adjustment equal to the spacing between the projections 31. With the setting once made a set screw 45 is fixed between the portion 23 and the member 25.

Within the nut 3| is a plurality of arcuate shaped openings 46 located ninety degrees apart into which there is extended looking screw 4! adapted to enter the portion 23. With a small adjustment of the nut 3|, the screws 41 can be left in place.

To efiect a small adjustment of the nut without removing the screws 41 and to positively lock the nut against rotation in addition to the looking of the same by the screws 41, there is provided a projection 48 which extends upwardly from the top of the portion 23 into an opening 5| in the nut 3|. The opening 5| extends in a transverse plane and contains adjusting screws 52 and 53 located respectively on opposite sides of the projection 48. By loosening one screw and tightening the other, the nut 3| will be adjusted.

Scale indications 55 are disposed on the front of the member 2|. A cap '56 having a central projection 51 into which threaded portion 33 of member 25 can be extended, is fixed to the top of the nut 3| by screws 58. By this cap, access to the 'arcuate openings 16 is prevented.

To further tighten the nut 3| on the threaded portion 33 of the member 25, there is provided a slit 59 in the nut 3| and a tightenin screw 6| which will serve to tighten the nut 3| upon the threaded portion 33. The measuring scale 36 extends through a slot 6?. in the member 2 l.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims;

I claim:

1. A measurement gauge. for bench work comprising a hollow member having a central opening therethrough, a central member axially adjustable through the central opening of the hollow member and having a threaded upper end, said first mentioned member having a radially extending slot, said central member having a radially extending opening, a scale and means for connecting the same to the central member within the opening thereof and adjustable with the central member within the opening and slot of the first mentioned member, an adjusting nut threadedly connected with the threaded upper end of the central member and engaging with the hollow member whereby to adjust the same with the scale axially along the first mentioned member and within the opening thereof, means for securing the adjusting nut to the first mentioned member and means for securing the first mentioned member to the central member.

2. A measurement gauge for bench work as defined in claim 1 and said central member having a threaded bore extending into each. of the opposite ends of the same and into the radially-extending opening thereof for engagement with the scale member disposed therein, said means'for connecting the scale to the central member comprising fastening screws entering the scale and said central member having elongated slots for receiving the fastening screws, adjusting screws within the threaded central bore of the central member for effecting a minute adjustment of the scale, said, adjusting screws engaging with the opposite upper and lower ends of the scale, and locking screws Within the threaded central bore of the central member for fixing the adjusting screws therein.

3. A measurement gauge for bench work as defined in claim 1, and said adjusting nut having arcuate shaped openings therein circumferentially spaced from one another, fastening screws extending into the openings for fixing the adjusting nut to the first mentioned member, said first mentioned member having a projection extending upwardly into the adjusting nut, said adjusting nut having an opening for receiving theupwardly extending projection of the first mentioned memher, and laterally extending adjusting screws in opposed alignment threaded in the adjusting nut and extending into the proj cation-receiving opening of the adjusting nut and engaging with the projection whereby to adjust and lock the adjusting nut against angular displacement relative to the first mentioned member.

4. A measurement gauge as defined inclaim 1, and said adjusting nut having a slit at one side thereof, and a fastening screw threadedly connected with and extending through the nut between the opposite sides of the slit whereby to efiect locking engagement of the nut with the threaded upper end of the central member.

JOHN F. CAMPBELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Bauer May 4, 1948 

